I do not trade shares so cannot give you a detailed answer I am afraid, MrCharts, Barjon and TheBlades trade stocks and shares so you could try PM'ing them for more specifics.
Software:
I would recommend you take a look at interactivebrokers for you broker, not sure about charts although they do supply them. (cheapest and widest range and very popular). A secondary chart program is advised.
Hardware:
2 monitors and a fast dedicated PC with a dedicated (connected not wireless) internet.
I personally have a laptop too, just in case of a problem with the PC and a wireless modem stick in case I have a problem with the main internet connection.
EOD, you don't need the best equipment in the world and 10 screens, just make sure you have dedicated equipment and a back up for internet connection and equipment.
As for LII (level 2 - just google it), that is a matter of preference which you will work out whether you need in time.
HTH
A regular poster who has a thread on US Stock trading:
http://www.trade2win.com/boards/us-stocks/38036-how-make-money-trading-markets.html
EDIT: You could go all the way if you wanted though............. (attached)!